<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			.one::before{
				content: '老鼠';
				color: red;
			}
			
			.one::after{
				content: '大米';
				font-size: 15px;
			}
		</style>
	</head>
	<body>
		<div class="one">
			爱
		</div>
	</body>
</html>